Home energy storage battery rack installation video

What is a rack-mounted battery?

2: Ready-built batteries such those produced by Pylontech are called Rack-mounted. They are intended to be built into a standard 19-inch 'server' rack. The capacity range for rack-mount batteries used to be lot wider, but the UK market has now become restricted to around 4-5kWh. Above that size they become too heavy to lift into the rack!

What is a DIY battery?

A DIY battery is composed of battery cells (that store the electricity), a battery management system (BMS) to monitor and manage the cells, and an enclosure/storage area in which to safely locate the cells and BMS. In this post I will consider only the cells, the other components will be discussed in a future post.

Are givenergy batteries floor-mounted?

They are intended to be built into a standard 19-inch 'server' rack. The capacity range for rack-mount batteries used to be lot wider, but the UK market has now become restricted to around 4-5kWh. Above that size they become too heavy to lift into the rack! The GivEnergy batteries, mentioned above, are all Floor-mounted.

How much profit does battery storage generate?

If we assume battery storage to have a 10-year working life then we'd generate £4410 profit over the remaining 5.25 years. This £4410 is the true ROI; £4410 / 10 years = £441 'profit' / year = 11% annual return on an initial £4000 investment.

How much battery storage do I Need?

Some days will be higher, some will be lower, I estimate I'll need ~10kWh of battery storage to safely cover the vast majority of days. It's also considered good practice for longevity not to let lithium batteries discharge below 10% or charge above 90%. Following that guidance, 12kWh of battery storage would look to be the ideal size.

How much does a pylontech battery cost?

PylonTech produce a 5.1kWh peak capacity battery (US5000), I could source two of these for ~ £3500 including VAT (note that batteries are VAT free if being installed at the same time as solar panels, not relevent in my case). That would give me 10.2kWh of storage, or 8.1kWh (£432/kWh) usable capacity with the 10/90% rule.